How is the main sequence lifespan of a massive star generally characterized compared to the Sun?

Answer

It is relatively brief, often lasting only a few million years.

Massive stars consume their nuclear fuel rapidly due to intense gravitational pressure, causing them to spend only a few million years on the Main Sequence, which is very brief compared to the Sun's projected 10 billion years.

How is the main sequence lifespan of a massive star generally characterized compared to the Sun?
astronomylife cyclestarstellar evolutionmassive stars